- Docente: Laura Govoni
- Credits: 3
- SSD: CEAR-05/A
- Language: English
- Teaching Mode: In-person learning (entirely or partially)
- Campus: Ravenna
- Corso: Second cycle degree programme (LM) in Offshore Engineering for Energy Transition (cod. 6707)
Learning outcomes
Building on previous soil mechanics knowledge, at the end of the course, students will be able to analyse the response of pipelines and other subsea systems, such as risers and mudmats from the geotechnical standpoint. Having developed a comprehensive understanding of the main issues that may arise in the installation and operational phases, the students will be also able to apply knowledgeably design solutions, within the framework of current international standards.
Course contents
The module provides the geotechnical principles and design methodologies for offshore pipelines and subsea foundation systems, with reference to current international standards and recommended practices. For submarine pipelines, the course focuses on pipe–soil interaction, including seabed embedment, vertical, lateral and axial resistance, cyclic loading effects, and on-bottom stability. The geotechnical design methods adopted in DNV-RP-F114 (2021) – Pipe-soil interaction for submarine pipelines are presented, together with their application to installation and operational conditions and the evaluation of design uncertainties.
The second part of the module is dedicated to geotechnical design of subsea foundation systems. The course covers the behaviour and design of shallow foundations, skirted foundations, and suction caissons, discussing failure mechanisms, bearing capacity, vertical, horizontal and moment loading, combined loading conditions, installation aspects and serviceability. Design approaches based on current DNV recommended practices are illustrated, with emphasis on limit-state design, numerical and analytical methods, and interpretation of site investigation data for offshore applications. The module also includes engineering examples and case studies aimed at illustrating the practical implementation of the design methodologies adopted in the offshore industry.
Readings/Bibliography
DNV. (2021). DNV-RP-F114: Pipe–Soil Interaction for Submarine Pipelines. Recommended Practice, Edition May 2021. DNV AS, Høvik, Norway.
DNV. (2021). DNV-ST-F101: Submarine Pipeline Systems. Standard, Edition August 2021 (amended December 2021). DNV AS, Høvik, Norway.
DNV. (2019). DNV-RP-C212: Offshore Soil Mechanics and Geotechnical Engineering. Recommended Practice, Edition September 2019, amended September 2021. DNV AS, Høvik, Norway.
Randolph, M. F., & Gourvenec, S. (2011). Offshore Geotechnical Engineering. London: Spon Press (Taylor & Francis). ISBN 978-0-415-46985-7. DOI: 10.4324/9780203889091.
Teaching methods
The course consists of lectures supported by slides and blackboard explanations, complemented by in-class worked examples and group problem-solving activities. Technical seminars delivered by industry professionals and invited experts will provide practical insights into current offshore geotechnical engineering practice.
Assessment methods
Written exams open books.
Teaching tools
Slides.
Office hours
See the website of Laura Govoni